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A Bohr hydrogen atom unđergoes a transit...

A Bohr hydrogen atom unđergoes a transition `n=5 rightarrow` `n=4` and emits a photon of frequency `v`. Frequency of circular motion of electron in `n=4` orbit is `v_(4)`. Find the ratio `(V) / (v)_(4)`

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The correct Answer is:
0.72
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